Improvement in molding-machines



3 Sheets--Sh eat I.

J. S. DEWING. improvement in Molding-Machines. No 128 289. Patentedlune25,1872.

witnesses:

3 Sheets--Sheet 2. J. S. DEWING. Improvement in Molding-Machines.

Patnted June 25,1872.

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3Sheets--Sheet3. 1.8. DEW|NG.

improvement in Molding-Machines. No.128,289

Patented June 25, 1872 ifituwsss: Q gunman %WL @w W be adjustedvertically by said nut.

UNITED STATES JAMES S. DEWING, OF ORANGE, MASSACHUSETTS.

IMPROVEMENT IN MOLDING-MACHINES.

Specification forming part of Letters Patent No. 128,289, dated June 25,1872.

Specification describin g a new and Improved Machine for CuttingMoldings, invented by JAMES S. DEWING, of Orange, in the county ofFranklin and State of Massachusetts.

The invention will first be described in connection with all that isnecessary to a full understanding thereof and then clearly pointed outin the claim.

Figure 1 is a plan view, with some parts sectioned, of my improvedmachine. Fig. 2 is a sectional elevation taken on the line 00 wof Fig.1, and Fig. 3 is a sectional elevation taken on the line 3 y of Fig. 1.

A is a circular horizontal table, supported above and at one side of abench or frame, B, on the opposite side of which is another frame,

0, somewhat higher than said frame B, by a tubular projection, E, on theunder side,fitted on a vertical shaft,F, above an adjusting-nut, G, andhaving a slot, H, in which a stud or key, I, fits to turn said table andallow it to The shaft F and the table are revolved slowly to feed thework past the cutters by the wheel K and worm J, the latter being turnedby cone-pulleys L M and belt N, and the pulleys M by the maindriving-shaft O, whereon a small pulley will be placed for a belt, whichwill work on the pulley P on the shaft Q carrying said pulleys M. Thelower end of shaft F rests in a step, R, and the upper one is supportedby a long bracket, S, projecting above the table from the high ppst T offrame B. U is a top rotary cutter, on ahorizontal spindle, I, mounted onframe 0, overhanging table A, and in a radial line of said table withthe end near the vertical axis of the table, supported in a bearing, W,on bracket S, and so arranged that it may slide in and out of saidbearing for adjusting it lengthwise, for which its support X on frame 0is arranged adj ustably thereon and provided with an adjusting-screw, Y,which adjustment is designed for accurately setting the cutter Urelatively to the work and the other cutters after being shifted forgreater variation by shif'tm'g the rings or collars Z from side to sideof it on the spindle I. This cutter is operated by the belt Z and largedrum Z the latter being on the main driving-shaft O. a and b representthe rotary side cutters, arranged on vertical axes, for dressing eachside of the circular piece, which is dressed on the top by cutter U.These cutters are supported on holders d, having a dovetail base fittedon the curved horizontal bar 0 and held by set-screws, so that they maybe adjusted toward or from the center of the table for pieces of largeor small curves. This'curved bar e is supported at one end on the top offrame '0, and at the other on the bracket S, and its curve is struckfrom the axis of vertical shaft f, whereon the driving-pulleys for saidcutters are mounted, and with which they are connected by belts g, andthe said shaft is driven by a belt, h, operated by a pulley onshaft 'i,which is driven by belt k, pulley l, and the main shaft 0. m, n, and jare spring-pressers for holding the work down. m is held on bar 0, andis adjustable for the varying sizes of work. a is on a rock shaft, 19,which has an arm, q, for applying pressure by a weight, and isadjustable on said rod. j is on a rock-shaft,j. The segmental pieces 1"to be dressed are secured on the segmental holders 8 by studs or pins tprojecting upward by driving them down with a mallet and carried aroundto the cutters, which, being properly adjusted beforehand, dress off thesaid pieces on three sides, as shown. A holder, 8, is provided for eachdifferent-sized 'curve or circle on which the stuff is to be dressed,and it will be secured to the table in any approved waysay, by boltsscrewing into it from the under side of the table. The holes in thetable for said bolts will be ar ranged in true circles, so that theholder will be properly adjusted by the act of applying it, so that butlittle time will be lost in shifting from one size to another; but it isintended not to shift often, for large quantities of pieces will beturned out when the respective holders are applied and the cuttersadjuste thereto.

"It will be seen that by this plan the work can be turned in ogee form,or with grooves of any kind on the face; also with an undercut groove inthe inside to receive the glass and the back at one operation, whichcannot be done with the ordinary arrangement of two vertical cutters,one on the inside and one on the outside of the curve, or similar to aand b but shaped to work to the center of the top.

The pieces are fastened down upon the holder and removed therefrom whilethe table is in motion; the finished pieces being taken off after theholder has carried the said finished piece from the cutters, and the newblank put on While said holder is passing the attendant to the cuttersagain.

The arrangement of the table A with the frame 0 and rotary cutter U ispurposely such that it may be readily adapted for planing or cuttingstraight moldings; also, simply by the application of feed-rollers A, tofeed the work along on the top of table A, which, at this time, will bestationary, or may turn, if preferred, and by the side 13 of frameO,saidrollers being mounted on the top of frame 0 in advance ofcutter-shaft I and overhanging the table A. These feed-rollers aregeared with the conepulley shaft 0 by a long pinion, D, to turn themboth in the same direction and allow them to be adjusted endwise, forwhich they are arranged and provided with adjustingscrews E, and thecone-pulleys G are driven by pulleys F on the shaft Q and a belt. Theobject of adjusting these feed-rollers endwise is to utilize them forinsuring the dressing of the upper surface of the work perpendicular tothe vertical side by holding the latter firmly against wall B of frame 0by means of collars G, with which they are provided to lap the sideopposite the one against B, and hold the work snugly against the saidwall B the said collars being drawn against the work by the screws. Theroughened portions of the feed-rollers are made up of rings held on bynuts H, which, being shifted from one side to the other of the collars,allow of adjusting the latter to wide or narrow stuff. The cutter U Ywill be shifted up to face B for cutting straight tically, for varyingthe thickness of the work,

which in both .cases passes under the cutter U. Generally the table Awill be stationary when cutting straight moldings, for which theconepulleys M that drive it are applied so as to run loose whenunclutched from pulley 1?, by a lever, P; but in case the stuff beingworked does not feed Well the table may turn also,bein g adjusted tohave about the same surface speed that the-rollers A do, so that,together with the collars G, which act powerfully on the side of thestuff they hug against, and the roughened parts of the feed-rollers, thestuff will be efficiently fed to the cutter and with but very littlefriction.

The feed-rollers are capable of rising and falling in the boxes J likeordinary feed-ro1lers, and they are provided with pressure-lever K andweights for varying the pressure.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent- A, of the horizontal cutter U and the verticalcutters a b, said cutters and table being adjustable, substantially asspecified.

2. The combination of rotary table A provided with tubular extension Eand vertical shaft F provided with stud I and adjustingnut G,substantially as and for the purpose set forth.

3. The adjustable feed-rolls having end collars G G and the wall B incombination with the cutter U and table A, as described, for the purposeof planing straight work.

- JAMES S. DEWING.

Witnesses:

R. D. CHASE, A. KILBURN.

1. The combination, with a revolving table,

